Electronic vaporization device and vaporizer thereof

ABSTRACT

A vaporizer includes: a heating top cover having an airway corner; a heating body; and a liquid return groove extending from the heating top cover to the heating body, the liquid return groove being arranged at the airway corner. In an embodiment, the vaporizer includes a main body and the main body includes a main airway. The heating top cover is arranged in the main body. A top cover airway is formed between the heating top cover and the main body. The top cover airway is in communication with the main airway through the airway corner.

CROSS-REFERENCE TO PRIOR APPLICATION

Priority is claimed to Chinese Patent Application No. 202122399160.6, filed on Sep. 30, 2021, the entire disclosure of which is hereby incorporated by reference herein.

FIELD

The present utility model relates to the technical field of electronic vaporization devices, and in particular, to a vaporizer and an electronic vaporization device.

BACKGROUND

A vaporizer is an important component of an electronic vaporization device that can vaporize liquid. When the vaporizer performs vaporization, gas formed through the vaporization can be outputted along a main airway of the vaporizer.

However, in a vaporization process performed by the vaporizer, a part of the gas located in the main airway is cooled down and liquefied, forming condensate in a liquid state. The part of condensate is outputted with the vapor in the main airway in an operating process of the vaporizer, resulting in liquid leakage of the vaporizer. To reduce the occurrence of this case, in some vaporizers, a structure for guiding the condensate in the main airway to a heating top cover may be arranged, to alleviate the leakage of the condensate.

However, in an actual vaporization process, the foregoing vaporizers have poor reliability in resistance against liquid leakage during inhaling.

SUMMARY

In an embodiment, the present invention provides a vaporizer, comprising: a heating top cover comprising an airway corner; a heating body; and a liquid return groove extending from the heating top cover to the heating body, the liquid return groove being arranged at the airway corner.

BRIEF DESCRIPTION OF THE DRAWINGS

Subject matter of the present disclosure will be described in even greater detail below based on the exemplary figures. All features described and/or illustrated herein can be used alone or combined in different combinations. The features and advantages of various embodiments will become apparent by reading the following detailed description with reference to the attached drawings, which illustrate the following:

FIG. 1 is a partial cross-sectional view of a vaporizer according to an embodiment of the present utility model.

FIG. 2 is a schematic structural diagram of a heating top cover and a heating body according to an embodiment of the present utility model.

FIG. 3 is another schematic structural diagram of a heating top cover and a heating body according to an embodiment of the present utility model.

FIG. 4 is still another schematic structural diagram of a heating top cover and a heating body according to an embodiment of the present utility model.

FIG. 5 is a schematic diagram of a return groove of a vaporizer according to an embodiment of the present utility model.

FIG. 6 is another schematic diagram of a return groove of a vaporizer according to an embodiment of the present utility model.

FIG. 7 is a cross-sectional view of a vaporizer (a direction of gas during operation of the vaporizer) according to an embodiment of the present utility model.

FIG. 8 is a cross-sectional view of a vaporizer (a direction of condensate during operation of the vaporizer) according to an embodiment of the present utility model.

DETAILED DESCRIPTION

In an embodiment, the present invention provides a vaporizer and an electronic vaporization device, to resolve the problem of poor reliability in resistance against liquid leakage of the vaporizer during inhaling.

A vaporizer includes a heating top cover and a heating body, the heating top cover includes an airway corner, and a liquid return groove extending from the heating top cover to the heating body is arranged at the airway corner.

In an embodiment, the vaporizer includes a main body, the main body includes a main airway, the heating top cover is arranged in the main body, a top cover airway is formed between the heating top cover and the main body, and the top cover airway is in communication with the main airway through the airway corner.

In one of the embodiments, a groove side wall of the liquid return groove close to a vaporization surface of the heating body includes a side wall opening, and the side wall opening is used for liquid to pass through.

In one of the embodiments, at least one groove side wall of the liquid return groove is provided with an inclined surface, and the inclined surface is configured to guide liquid to flow to the heating body.

In one of the embodiments, at least a part of a structure of the heating body is accommodated in the liquid return groove, and the inclined surface gradually approaches the heating body in a direction away from a bottom wall of the liquid return groove.

In one of the embodiments, the heating top cover is provided with a liquid guide groove, the liquid guide groove is in communication with the liquid return groove, and the liquid guide groove is configured to guide liquid to flow to the liquid return groove.

In one of the embodiments, one end of the liquid guide groove is located at the airway corner, and an other end is located on a side of the heating top cover close to the vaporization surface.

In one of the embodiments, the plurality of liquid return grooves are spaced apart at the airway corner.

In one of the embodiments, a quantity of liquid return grooves located in a middle portion of the heating top cover is M, and a quantity of liquid return grooves located at an edge of the heating top cover is N, and M is greater than or equal to N.

An electronic vaporization device includes a power supply assembly and the foregoing vaporizer, where the power supply assembly is electrically connected to the heating body of the vaporizer.

In the vaporizer and the electronic vaporization device, a liquid return groove is arranged at an airway corner, to guide liquid detained at the airway corner to a heating element for secondary vaporization of the liquid. The arrangement of the liquid return groove may also effectively reduce the occurrence of a case in which liquid is accumulated and detained, thereby reducing the case in which the liquid enters the main airway and leaks in a vaporization process. The foregoing arrangement manner features low costs and a simple structure, and enables the vaporizer and the electronic vaporization device to have better resistance against liquid leakage during inhaling.

Reference signs: 100. main body; 110. main airway; 120. first housing; 130. second housing; 140. liquid storage tank; 141. liquid outlet; 200. heating top cover; 201. recess; 210. top cover airway; 220. airway corner; 230. liquid return groove; 231. groove bottom wall; 232. side wall opening; 233. first side wall; 234. second side wall; 235. third side wall; 236. fourth side wall; 237. inclined surface; 240. liquid guide groove; 241. convex bar; 250. liquid inlet; 260. liquid passing channel; 270. protruding portion; 271. flange; 300. heating body; and 310. heating surface.

To make the foregoing objects, features and advantages of the present utility model more comprehensible, detailed description is made to specific implementations of the present utility model below with reference to the accompanying drawings. In the following description, many specific details are provided to facilitate a full understanding of the present utility model. However, the present utility model may alternatively be implemented in other manners different from those described herein, and a person skilled in the art may make similar modifications without departing from the content of the present utility model. Therefore, the present utility model is not limited to the embodiments disclosed below.

In the description of the present utility model, it should be understood that directions or location relationships indicated by terms “center”, “longitudinal”, “transversely”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise” “axial direction”, “radial direction” and “circumferential direction” are directions or location relationships shown based on the accompanying drawings, are merely used for the convenience of describing the present utility model and simplifying the description, but are not used to indicate or imply that a device or an element needs to have a particular direction or be constructed and operated in a particular direction, and therefore, cannot be understood as a limitation to the present utility model.

In addition, the terms “first” and “second” are used merely for the purpose of description, and shall not be construed as indicating or implying relative importance or implying a quantity of indicated technical features. Therefore, features defining “first” and “second” can explicitly or implicitly include at least one of the features. In description of the present utility model, “multiple” means at least two, such as two and three unless it is specifically defined otherwise.

In the present utility model, unless otherwise explicitly specified and defined, terms such as “mounted”, “connected”, “connection”, and “fixed” should be understood in broad sense, for example, the connection may be a fixed connection, a detachable connection, or an integral connection; or the connection may be a mechanical connection or an electrical connection; or the connection may be a direct connection, an indirect connection through an intermediary, or internal communication between two elements or a mutual action relationship between two elements, unless otherwise specified explicitly. A person of ordinary skill in the art can understand specific meanings of the terms in the present utility model according to specific situations.

In the present utility model, unless explicitly specified or limited otherwise, a first characteristic “on” or “under” a second characteristic may be the first characteristic in direct contact with the second characteristic, or the first characteristic in indirect contact with the second characteristic by using an intermediate medium. In addition, the first feature being located “above” the second feature may be the first feature being located directly above or obliquely above the second feature, or may simply indicate that the first feature is higher in level than the second feature.

The first feature “under”, “below” and “down” the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that a horizontal height of the first feature is less than that of the second feature.

It should be noted that, when a component is referred to as “being fixed to” or “being arranged on” another component, the component may be directly on the another component, or there may be an intermediate component. When a component is considered to be “connected to” another component, the component may be directly connected to the another component, or an intervening component may also be present. The terms “vertical”, “horizontal”, “upper”, “down”, “left”, “right” and similar expressions used in this specification are only for purposes of illustration but not indicate a unique implementation.

An embodiment of the present utility model provides an electronic vaporization device, including a vaporizer and a power supply. The power supply is configured to supply power to the vaporizer, so that the vaporizer can heat floral and foliar liquids and herbal liquids to form gases through vaporization. The power supply can be selected in the related art.

Referring to FIG. 1 to FIG. 8 , an embodiment of the present utility model provides a vaporizer, including a main body 100 and a heating top cover 200 and a heating body 300 that are connected to each other and that are arranged in the main body 100.

The main body 100 includes a main airway 110, and the main airway 110 is in communication with the external atmosphere. The main airway 110 is configured to output the vapor after vaporization, and then guide the vapor into the mouth of a user. In the embodiment shown in FIG. 1 and FIG. 4 , the main body 100 includes a hollow first housing 120 and a hollow second housing 130. The first housing 120 is at least partially located inside the second housing 130. Optionally, the first housing 120 and the second housing 130 are an integrally formed structure or may be a structure in which the first housing 120 and the second housing 130 are separately formed and then assembled into a whole. A hollow portion of the first housing 120 forms the main airway 110. A liquid storage tank 140 for storing liquid is formed between the first housing 120 and the second housing 130. A liquid outlet 141 is provided on a side of the liquid storage tank 140, and the liquid in the liquid storage tank 140 can flow out from the liquid outlet 141.

The heating body 300 includes a heating surface 310, and a heating core is arranged on the heating surface 310. The heating core can be electrically connected to the power supply, so that when the power supply supplies power, the heating core generates heat and vaporizes liquid that permeates into the heating surface. The heating top cover 200 includes a liquid passing channel 260 (shown in FIG. 7 ). A side of the liquid passing channel 260 includes a liquid inlet 250 corresponding to the liquid outlet 141, so that the liquid can flow into the liquid inlet 250 along the liquid outlet 141 and enter the liquid passing channel 260. An other side of the liquid passing channel 260 is in communication with a side of the heating body 300 away from the heating surface 310, so that the liquid comes into contact with the heating body 300. When the liquid is vaporized, the liquid enters the liquid passing channel 260 from the liquid storage tank 140 and enters the heating body 300, and then the liquid is vaporized to form a gas under the heating of the heating surface 310 of the heating body 300.

As shown in FIG. 1 , a top cover airway 210 is formed between the heating top cover 200 and an inner wall of the main body 100. The heating top cover 200 includes an airway corner 220, and the top cover airway 210 is in communication with the main airway 110 through the airway corner 220. In the embodiment shown in the figure, the heating top cover 200 can be in a U-like shape. A side of the heating top cover 200 can be provided with two liquid inlets 250 that are spaced apart. A recess 201 is formed in a middle portion of the side of the heating top cover 200 in a direction (that is, a direction in which a Z axis is located in the figure) of approaching the heating body 300. There is a gap between the recess 201 and the main body 100, to form the airway corner 220, and the airway corner 220 is in communication with the main airway 110. The top cover airway 210 can be formed between a side wall of the heating top cover 200 and the second housing 130 of the main body 100. The liquid (that is, condensate) formed through condensation of gas in the top cover airway 210 can return to the airway corner 220. A shape and a structure of the top cover airway 210 are not specifically limited, and can be selected according to actual conditions.

The liquid entering the liquid passing channel 260 from the liquid storage tank 140 is vaporized under the heating of the heating body 300, so that gas is obtained. As shown in arrows in FIG. 4 , the gas enters the main airway 110 through the airway corner 220 along the top cover airway 210, and moves to the outside of the main body 100 for a user to inhale. In this process, a part of the vapor may be cooled down and liquefied during the movement, forming condensate. As shown by arrows in FIG. 5 , the condensate returns to the airway corner 220 along an inner wall (that is, an inner wall of the first housing 120) of the main airway 110. Because in a vertical direction (that is, a Z-axis direction in FIG. 1 to FIG. 5 ), a height of the recess 201 of the heating top cover 200 is lower than a height of other parts of the heating top cover 200, the liquid is accumulated at the airway corner 220. As the vaporizer continuously performs vaporization, the accumulated liquid may be discharged from the main airway 110 as driven by an air flow during inhaling, causing liquid leakage, further resulting in poor reliability in resistance against the liquid leakage of the vaporizer during inhaling.

In some embodiments, as shown in FIG. 1 to FIG. 8 , a liquid return groove 230 extending to the heating body 300 is arranged at the airway corner 220, so as to improve the reliability in resistance of the vaporizer against liquid leakage during inhaling. The liquid return groove 230 may be provided for the liquid accumulated at the airway corner 220 to return to the heating body 300. That is, the recess 201 of the heating top cover 200 is provided with the liquid return groove 230, and a side of the liquid return groove 230 is in communication with the heating body 300, so that the liquid can flow to the heating body 300 along the liquid return groove 230 as shown by arrows in FIG. 2 and FIG. 3 . The liquid on a surface of the heating body 300 can move into the heating body 300, or secondary vaporization can be performed on the liquid on the surface of the heating body 300 to form vapor. It is easy to understand that the heating body 300 can be made of a material such as a porous ceramic or porous metal, but is not limited to the foregoing materials. The heating body 300 can be made of any material that implements secondary vaporization after the liquid comes into contact with the surface of the heating body 300.

For ease of description, a groove depth direction of the liquid return groove 230 is defined as a depth direction (an X-axis direction in FIG. 1 to FIG. 4 ) of the liquid return groove 230. A direction of the liquid return groove 230 along the heating top cover 200 to the heating surface 310 of the heating body 300 is defined as a length direction (a Z-axis direction in FIG. 1 to FIG. 5 ) of the liquid return groove 230. A direction perpendicular to both the length direction and the depth direction is defined as a width direction (a Y-axis direction in FIG. 1 to FIG. 5 ) of the liquid return groove 230.

A shape and a size of the liquid return groove 230 can both be adjusted according to actual conditions. In the embodiment shown in the figure, shapes of the liquid return grooves 230 are all cuboid or cuboid-like.

In some embodiments, the liquid return groove 230 is arranged on a side of the heating top cover 200 close to the heating body 300. The surface of the heating body 300 can be exposed to the airway corner 220 from the liquid return groove 230.

As shown in FIG. 1 to FIG. 8 , the liquid return groove 230 is formed by a bottom wall 231 and groove side walls that are arranged in a surrounding manner.

The bottom wall 231 (shown in FIG. 6 to FIG. 8 ) is located on a side of the liquid return groove 230 along a depth direction and close to the heating body. The bottom wall 231 of the liquid return groove 230 runs through the heating top cover 200, so that the liquid return groove 230 forms a through hole in the X-axis direction.

As shown in FIG. 5 and FIG. 6 , the groove side walls may include a first side wall 233, a second side wall 234, a third side wall 235, and a fourth side wall 236 that are connected end to end. The first side wall 233 and the third side wall 235 are arranged opposite to each other in the length direction (Z-axis direction) of the liquid return groove 230. The first side wall 233 is located on a side that is away from the heating surface 310. The third side wall 235 is located on a side close to the heating surface 310. The second side wall 234 and the fourth side wall 236 are arranged opposite to each other in the width direction (Y-axis direction) of the liquid return groove 230.

In some embodiments, as shown in FIG. 1 to FIG. 3 , the groove side wall of the liquid return groove 230 include a side wall opening 232, and the side wall opening 232 is used for liquid to pass through.

For example, in some embodiments, the third side wall 235 of the liquid return groove 230 is provided with at least one side wall opening 232, and the liquid can flow in the length direction (Z-axis direction) of the liquid return groove 230 to flow to the heating body 300 for secondary vaporization. The liquid can also move in the depth direction (X-axis direction) of the liquid return groove 230, to be adsorbed to the surface of the heating body 300 for secondary vaporization.

In another example, in some other embodiments, at least one groove side wall of the second side wall 234 or the fourth side wall 236 of the liquid return groove 230 and the third side wall 235 are both provided with the side wall openings 232. The liquid can flow to the surface of the heating body 300 along any one of the side wall openings 232 for secondary vaporization.

As shown in FIG. 4 , in some other embodiments, the groove side walls of the liquid return groove 230 are all not provided with a side wall opening. The liquid moves in the depth direction (X-axis direction) of the liquid return groove 230, to be adsorbed to the surface of the heating body 300 for secondary vaporization.

In some embodiments, as shown in FIG. 6 , at least one groove side wall of the liquid return groove 230 is provided with an inclined surface 237. The inclined surface 237 can guide the liquid to flow to the heating body 300. The inclined surface 237 gradually approaches the heating body 300 in a moving direction of the liquid. That is, the inclined surface 237 gradually approaches the heating body 300 in a direction from the groove side wall to a middle portion of the groove. An inclination angle of the inclined surface 237 can be adjusted according to actual conditions.

For example, in some implementations, the groove side wall of the liquid return groove 230 along the length direction of the liquid return groove 230 and away from the heating surface 310 is provided with the inclined surface 237. That is, the first side wall 233 of the liquid return groove 230 is provided with the inclined surface 237. The inclined surface 237 gradually approaches the heating body 300 in a direction from the first side wall 233 to the third side wall 235. The liquid can flow through the liquid return groove 230 along the inclined surface 237 arranged on the first side wall 233 and flow to the surface of the heating body 300.

In another example, in some other implementations, the first side wall 233, the second side wall 234, and the fourth side wall 236 of the liquid return groove 230 are all provided with inclined surfaces 237 to facilitate the liquid to flow into the liquid return groove 230.

In some embodiments, in the length direction of the liquid return groove 230, a thickness of the groove side wall of the liquid return groove 230 gradually decreases. In some other embodiments, in the length direction of the liquid return groove 230, a thickness of the groove side wall of the liquid return groove 230 remains unchanged.

In some embodiments, in the depth direction of the liquid return groove 230, a bottom wall 231 of the liquid return groove 230 abuts against the heating body 300.

In some other embodiments, there may be a specific gap between the bottom wall 231 of the liquid return groove 230 and the side wall of the heating body 300. It should be noted herein that a width of the gap in the depth direction of the liquid return groove 230 cannot be too large, and needs to satisfy that the surface of the liquid flowing to the groove bottom wall 231 of the liquid return groove 230 can come into contact with the surface of the heating body 300, to facilitate secondary vaporization of the liquid.

There is one or more liquid return grooves 230.

For ease of description, a total width of the heating top cover 200 in the width direction of the liquid return groove 230 is defined as D. A portion of the heating top cover 200 located in a range of from 0.25 D to 0.75 D (including end points) is defined as a middle portion of the heating top cover 200. A portion of the heating top cover 200 that is located in a range of from 0 to 0.25 D (excluding end points) or from 0.75 D to D (excluding end points) is defined as an edge of the heating top cover 200.

For example, in some embodiments, there is one liquid return groove 230, and the liquid return groove 230 is located in the middle portion of the heating top cover 200 in the width direction of the liquid return groove 230.

In another example, in some other embodiments, there are two or more liquid return grooves 230 is, and the liquid return grooves 230 are spaced apart on the heating top cover 200.

In some of the implementations, all the liquid return grooves 230 are spaced apart in the width direction of the liquid return grooves 230. All, some, or none of gaps between adjacent liquid return grooves 230 have the same width.

For example, in an implementation, the liquid return grooves 230 are equally spaced apart.

In another example, in another implementation, there are a plurality of liquid return grooves 230, and in the width direction of the liquid return grooves 230, the quantity of liquid return grooves 230 that are located in the middle portion of the heating top cover 200 is M (M is a positive integer). The quantity of liquid return grooves 230 that are located at an edge of the heating top cover 200 is N (N is a positive integer), and M is greater than or equal to N.

In some implementations, the liquid return grooves 230 can be arranged in one or more rows in the length direction of the liquid return grooves 230, and each row includes a plurality of liquid return grooves 230.

For example, in an implementation shown in the figure, the liquid return grooves 230 are arranged in one row.

In another example, in other implementations, the liquid return grooves 230 may be arranged in a plurality of rows, and all, some, or none of the liquid return grooves 230 in adjacent rows are equidistant. In addition, all, some, or none of the liquid return grooves 230 in each row are located at the same horizontal position.

In addition, in a case that a plurality of liquid return grooves 230 are arranged, all, some, or none of the liquid return grooves 230 have the same length and the same width.

For example, in an implementation, all of the liquid return grooves 230 have the same length and the same width and are equally spaced apart.

In another example, in an implementation, none of the liquid return grooves 230 have the same length and the same width, and the liquid return grooves 230 are equally spaced apart. In addition, in the width direction of the liquid return grooves 230, a width of the liquid return groove 230 located in the middle portion of the heating top cover 200 is larger than a width of the liquid return groove 230 located at the edge of the heating top cover 200, and a length of the liquid return groove 230 located in the middle portion of the heating top cover 200 is smaller than a length of the liquid return groove 230 located at the edge of the heating top cover 200.

In another example, in an implementation, none of the liquid return grooves 230 have the same length, but all of the liquid return grooves 230 have the same width, and the liquid return grooves 230 are equally spaced apart. In addition, in the width direction of the liquid return grooves 230, a length of the liquid return groove 230 located in the middle portion of the heating top cover 200 is smaller than a length of the liquid return groove 230 located at the edge of the heating top cover 200.

It should be noted herein that regardless of whether the length of the liquid return groove 230 is greater or smaller, groove bottoms of all the liquid return grooves 230 completely or partially expose the side wall of the heating body 300. That is, the liquid return groove 230 may be provided for the liquid to return to the heating body 300 from the airway corner 220.

In an embodiment, the liquid return grooves 230 may be arranged on two opposite side walls of the heating top cover 200 in the depth direction of the liquid return grooves 230. In some other embodiments, the liquid return grooves 230 may only be arranged on a specific side wall of the heating top cover 200.

As shown in FIG. 1 , FIG. 2 , FIG. 6 , and FIG. 7 , the heating top cover 200 is provided with a liquid guide groove 240. A side of the liquid guide groove 240 is located at the recess 201 or close to the recess 201, and an other side of the liquid guide groove 240 is located on a side of the heating top cover 200 close to the heating surface 310. The side wall of the liquid guide groove 240 may partially protrude from an outer surface of the heating top cover 200, or may be flush with the outer surface of the heating top cover 200.

For example, in the embodiment shown in the figure, a convex bar 241 is arranged on the heating top cover 200. The convex bar 241 is arranged in the length direction of the liquid return groove 230. There are a plurality of convex bars 241, and the convex bars 241 are spaced apart. The liquid guide groove 240 is formed between adjacent convex bars 241.

As shown in arrows in FIG. 2 , the liquid guide groove 240 is in communication with the liquid return groove 230, so that the liquid accumulated at the airway corner 220 flows along the liquid guide groove 240 to the liquid return groove 230, and then enters the heating body 300. In addition, the arrangement of the liquid guide groove 240 enables the liquid to flow to the liquid return groove 230 along a specific line in a relatively concentrated manner. That is, under the action of the liquid guide groove 240, a large amount of the liquid flow s along the liquid guide groove 240 to the liquid return groove 230 for secondary vaporization. However, a small amount of the liquid may flow to the heating body 300 along a portion of the heating top cover 200 on which no liquid guide groove 240 is arranged.

In some of the implementations, a side of the liquid guide groove 240 away from the main airway 110 is in communication with the liquid return groove 230. In some other implementations, a middle portion of the liquid guide groove 240 is in communication with the liquid return groove 230. A position of the liquid return groove 230 relative to the liquid guide groove 240 can be adjusted according to actual conditions.

As shown in FIG. 2 to FIG. 7 , in some embodiments, a protruding portion 270 may further arranged on the recess 201 of the heating top cover 200, and the protruding portion 270 and the heating top cover 200 can be integrally formed or be connected in another manner. The protruding portion 270 extends in a direction of the main airway 110. A flange 271 may be disposed at a joint between the protruding portion 270 and the recess 201 of the heating top cover 200, and a surface of the flange 271 may be an inclined flat surface or an inclined curved surface, so that the liquid flows from the recess 201 along the surface of the flange 271 to the liquid return groove 230. The arrangement of the protruding portion 270 can reduce a depth of the recess 201 without affecting ventilation of the airway corner 220, so as to reduce a maximum accumulation amount of the accumulated liquid.

In the present utility model, the liquid return groove 230 is arranged on the heating top cover 200, so that the liquid accumulated at the airway corner 220 may return to the heating body 300 in the depth direction of the liquid return groove 230 for secondary vaporization. In addition, the foregoing arrangement can reduce a case in which the liquid leaks out of the vaporizer from the main airway 110, thereby effectively improving the resistance against liquid leakage of the vaporizer and the electronic vaporization device during inhaling.

The technical features in the above embodiments may be randomly combined. For concise description, not all possible combinations of the technical features in the embodiment are described. However, provided that combinations of the technical features do not conflict with each other, the combinations of the technical features are considered as falling within the scope recorded in this specification.

The foregoing embodiments only describe several implementations of the present utility model, and their description is specific and detailed, but cannot therefore be understood as a limitation to the patent scope of the present utility model. It should be noted that for a person of ordinary skill in the art, several transformations and improvements can be made without departing from the creative idea of the present utility model. These transformations and improvements belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model is subject to the protection scope of the appended claims.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. It will be understood that changes and modifications may be made by those of ordinary skill within the scope of the following claims. In particular, the present invention covers further embodiments with any combination of features from different embodiments described above and below. Additionally, statements made herein characterizing the invention refer to an embodiment of the invention and not necessarily all embodiments.

The terms used in the claims should be construed to have the broadest reasonable interpretation consistent with the foregoing description. For example, the use of the article “a” or “the” in introducing an element should not be interpreted as being exclusive of a plurality of elements. Likewise, the recitation of “or” should be interpreted as being inclusive, such that the recitation of “A or B” is not exclusive of “A and B,” unless it is clear from the context or the foregoing description that only one of A and B is intended. Further, the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise. Moreover, the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C. 

What is claimed is:
 1. A vaporizer, comprising: a heating top cover comprising an airway corner; a heating body; and a liquid return groove extending from the heating top cover to the heating body, the liquid return groove being arranged at the airway corner.
 2. The vaporizer according to claim 1, wherein the vaporizer comprises a main body and the main body comprises a main airway, wherein the heating top cover is arranged in the main body, wherein a top cover airway is formed between the heating top cover and the main body, and wherein the top cover airway is in communication with the main airway through the airway corner.
 3. The vaporizer according to claim 1, wherein a groove side wall of the liquid return groove close to a vaporization surface of the heating body comprises a side wall opening, and wherein the side wall opening is configured for liquid to pass through.
 4. The vaporizer according to claim 1, wherein at least one groove side wall of the liquid return groove is provided with an inclined surface, and wherein the inclined surface is configured to guide liquid to flow to the heating body.
 5. The vaporizer according to claim 4, wherein at least a part of a structure of the heating body is accommodated in the liquid return groove, and wherein the inclined surface gradually approaches the heating body in a direction away from a bottom wall of the liquid return groove.
 6. The vaporizer according to claim 1, wherein the heating top cover is provided with a liquid guide groove in communication with the liquid return groove, and wherein the liquid guide groove is configured to guide liquid to flow to the liquid return groove.
 7. The vaporizer according to claim 6, wherein one end of the liquid guide groove is located at the airway corner, and an other end is located on a side of the heating top cover close to the vaporization surface.
 8. The vaporizer according to claim 1, wherein the plurality of liquid return grooves are spaced apart at the airway corner.
 9. The vaporizer according to claim 1, wherein a quantity of liquid return grooves located in a middle portion of the heating top cover is M, wherein a quantity of liquid return grooves located at an edge of the heating top cover is N, and wherein M is greater than or equal to N.
 10. An electronic vaporization device, comprising: a power supply assembly; and the vaporizer claim 1, wherein the power supply assembly is electrically connected to the heating body of the vaporizer. 